例:对新产品的需求数据分析1 300 X=300-2X cEevE 10 Pr 12-6 Fig 12-1 Scattergram between income (X3) and price( X212-6 例：对新产品的需求数据分析1 Fig 12-1 Scattergram between income (X3) and price (X2)